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An unseen poem in exam conditions can be the source of much stress for students. It is crucial that when the time comes, you remain calm and collected, even if at first the poem appears difficult.

'Est-ce que' is a very versatile group of words, centered around the word 'est', from the verbe 'etre', meaning 'to be'.

'Est-ce que' can be translated into various meanings, depending on...

As with much of complex number the trick here is to change forms to polar representation.If you think of an argand diagram the number i will be represented as a point straight up on the imaginary...

This is a common IB question- fairly tricky the first time you com across it!

This questions relies on understanding of electronegativity, instantaneous dipoles and temporary induced dipoles.Van der Waal's forces (also called London Dispersion Forces) are weak intermolecular forces...